Graham’s treasurer says he has complied with subpoena

A campaign treasurer for D.C. Council member Jim Graham says he has already complied with a subpoena the U.S. Attorney’s Office sent on Wednesday in connection with a broad investigation into one of the city’s most prolific political donors.

Nelson Ayala said he turned over documents relating to Mr. Graham’s campaign donations in 2005-2010 on Thursday.

Mr. Graham, Ward 1 Democrat, joins the growing ranks of council members linked to the federal investigation into contributions from Jeffery E. Thompson, his companies and his associates.

Other elected officials say their campaigns have not been served, while some - such as council members Marion Barry, Ward 8 Democrat, and Muriel Bowser, Ward 4 Democrat - have declined to confirm or deny receipt.

The subpoenas have been issued on a rolling basis since Tuesday, suggesting any council member who has received money from Mr. Thompson or his affiliates will receive one.

Council member Tommy Wells, Ward 6 Democrat, has said he does not expect to receive a subpoena because he never accepted campaign funds from Mr. Thompson’s fundraising network.

Although federal investigators have not disclosed what they are looking for, discussion around city hall suggests the use of money orders — which could be used to shroud straw donors to various campaigns — may be their focus.

Council member Mary M. Cheh, Ward 3 Democrat, plans to introduce legislation on Tuesday that would treat money-order donations like cash contributions, capping them at $25.